<s>
DNF	B-Application
or	O
Dandified	O
YUM	B-Application
is	O
the	O
next-generation	O
version	O
of	O
the	O
Yellowdog	B-Application
Updater	I-Application
,	I-Application
Modified	I-Application
(	O
yum	B-Application
)	O
,	O
a	O
package	B-Application
manager	I-Application
for	O
.rpm-based	O
Linux	B-Application
distributions	I-Application
.	O
</s>
<s>
DNF	B-Application
was	O
introduced	O
in	O
Fedora	O
18	O
in	O
2013	O
,	O
it	O
has	O
been	O
the	O
default	O
package	B-Application
manager	I-Application
since	O
Fedora	O
22	O
in	O
2015	O
,	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
8.	O
,	O
and	O
OpenMandriva	O
;	O
and	O
also	O
an	O
alternative	O
package	B-Application
manager	I-Application
for	O
Mageia	O
.	O
</s>
<s>
Perceived	O
deficiencies	O
of	O
yum	B-Application
(	O
which	O
DNF	B-Application
is	O
intended	O
to	O
address	O
)	O
include	O
poor	O
performance	O
,	O
high	O
memory	O
usage	O
,	O
and	O
the	O
slowness	O
of	O
its	O
iterative	O
dependency	B-Algorithm
resolution	I-Algorithm
.	O
</s>
<s>
DNF	B-Application
uses	O
,	O
an	O
external	O
dependency	B-Algorithm
resolver	I-Algorithm
.	O
</s>
<s>
DNF	B-Application
performs	O
package	B-Application
management	I-Application
tasks	O
on	O
top	O
of	O
RPM	B-Application
,	O
and	O
supporting	O
libraries	O
.	O
</s>
<s>
DNF	B-Application
was	O
originally	O
written	O
in	O
Python	B-Language
,	O
but	O
efforts	O
are	O
under	O
way	O
to	O
port	O
it	O
to	O
C	B-Language
and	O
move	O
most	O
functionality	O
from	O
Python	B-Language
code	I-Language
into	O
the	O
new	O
libdnf	O
library	O
.	O
</s>
<s>
libdnf	O
is	O
already	O
used	O
by	O
PackageKit	B-Language
,	O
a	O
Linux	O
distribution-agnostic	O
package	O
system	O
abstraction	O
library	O
,	O
even	O
though	O
the	O
library	O
does	O
not	O
have	O
most	O
of	O
DNF	B-Application
's	O
features	O
.	O
</s>
<s>
DNF	B-Application
has	O
been	O
the	O
default	O
command-line	O
package	B-Application
manager	I-Application
for	O
Fedora	O
since	O
version	O
22	O
,	O
which	O
was	O
released	O
in	O
May	O
2015	O
.	O
</s>
<s>
The	O
libdnf	O
library	O
is	O
used	O
as	O
a	O
package	O
backend	O
in	O
PackageKit	B-Language
,	O
which	O
offers	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
.	O
</s>
<s>
Later	O
dnfdragora	B-Application
was	O
developed	O
for	O
Fedora	O
27	O
as	O
another	O
alternative	O
graphical	O
front-end	O
of	O
DNF	B-Application
.	O
</s>
<s>
DNF	B-Application
has	O
also	O
been	O
available	O
as	O
an	O
alternate	O
package	B-Application
manager	I-Application
for	O
Mageia	O
Linux	B-Application
since	O
version	O
6	O
and	O
may	O
become	O
the	O
default	O
sometime	O
in	O
the	O
future	O
.	O
</s>
<s>
It	O
is	O
also	O
the	O
default	O
package	B-Application
manager	I-Application
for	O
RedHat	O
Enterprise	O
Linux	B-Application
,	O
and	O
by	O
extension	O
,	O
Rocky	O
Linux	B-Application
.	O
</s>
